Page 7
The charts in (Sections2-7 and 2-8) show the voltage/amperage output and duty
cycle of a stud welding power source that uses an external device for setting
amperage and time.
NOTE
2-7. Volt/Ampere Curve - Constant Current (CC) Power Source
0
100
200
300
400
500
600
700
800
10
20
30
40
50
60
70
80
Min.
Max.
DC AMPERES
DC VOL
TS
2-8. Duty Cycle - Power Source For Constant Current (CC) Welding
150
35
40
50
60
70
80 90 100
200
250
300
400
500
600
700
% DUTY CYCLE
RATED OUTPUT
30
25
20
WELDING AMPERES
Explanation of charts:
A nominal voltage for stud welding is 30 volts dc.
To determine the duty cycle of stud welding while using a constant current (CC) power source:
D
A horizontal dotted line is extended from 30 volts in section 2-7.
D
The 600 amps shown in section 2-7 is then used in section 2-8 to determine the duty cycle.
D
The result is 26% duty cycle.
